Quote Originally Posted by glennsexton View Post
My first thought is that you you may be rich on the primary jets/metering. The Edelbrocks are a bit rich out of the box and if you had a 1406, I would point you to their (Edelbrock's) web site for the instructions on how to diagnose and then replace the jets/metering rods. I'm assuming that you have a true "AFB".
Good info... I have both Carter and Edelbrock manuals, which look suspiciously identical, I guess I should get the Tuning Kit that has the assortment of rods and jets. Yes my Carter is a true AFB

While I suspect that your Carter may be a jet size bigger than it needs to be, a quick check can confirm. If you have a good shop near by, they can sniff the exhaust and tell you if that's the problem. I'd try that first.
Not sure if any local shops have smog sniffing setups for hotrodders, most all focus on smog here is for registration and environmental - or are you suggesting a dyno shop?

Quote Originally Posted by Dave Severson View Post
Transition circuit is a step or two fat... As Glen said, most are fat out of the box... If you don't have the Edelbrock calibration kit, you'll need to get it then follow the chart in the book (or on the Edelbrock site) to get the carb dialed in... Once you get the calibration right on the carb, you may want to reconnect the vacuum to the ported side of the carb, then work on the vacuum canister to slow down the advance rate a bit.....
I have gone over the chart, don't really understand it yet, and have called Edelbrock tech spt, they pointed me towards step up springs and accel pump rod holes - I tried ALL they suggested and have not seen any significant improvement at all.

From what you two gentlemen are suggesting I might want to change metering rods to one with a smaller rich-step and/or go to a leaner main jet - did I get that right?

Thanks to both Glenn and Dave